The components have arrived!

The components have arrived today! As you can see I've taken the time to organise the components. Now you just need to come and solder everything together!

Progress Report 008

Progress, PROGRESS!

As you can see from the photograph, I've now separated the transmitter (top) and receiver (bottom) circuits on two separate boards. Each circuit is running on two 9V batteries but my next task is to have it run on one 9V. Additionally the receiver is now relaying the received signal to the M32. I've used two M32's in this case just to make a quick test: the signal from the receiver circuit grounds a pin on the first M32 which in turns outputs HIGH on another pin connected to the second M32. The second M32 translates the signals into Morse code and displays it on the LCD. We won't actually be needing two M32's as the first M32 will be replaced by an inverter plus noise filter circuit in the next step.

So this is good news because the new battery-powered transmitter/receiver is now working with the old Morse code program! Of course, there's still some issues with noise, sensitivity and the need to isolate the circuit from the body: it's a matter of making it perfect now!



Transferred Message: AT YOUR SERVICE

Progress Report 007

Okay, so I have been lazy for quite some time but finally here is a post that is worth the 1 month pause!

Transmitter and Receiver are now working entirely on batteries and WITHOUT A COMMON GROUND!

I won't go into the technical details but there are still many things to perfect before this will work flawlessly. (No, we won't be using those two big racing car batteries to power the op-amp! I just ran out of 9V batteries to test) Nonetheless I think we have gotten over one of our biggest obstacles!

To convince you, Valerie, I've included a photograph and a video of the prototype. You can see that the transmitter is on the right and the receiver is on the left. There's no physical connection between the two circuits. The only contact points are the two electrodes in the middle; when a connection is made between these two points the led on the receiver will light up!